background: alpha-thalassemia syndrome includes a group of hereditary anemia in which expression of alpha globin chains is decreased or absent. impaired rbc in patients with thalassemia causes vessel involvement and endothelial cell vessel disturbance. vascular endothelial growth factor (vegf) is the most important regulator for endothelial cell proliferation. so, the aim of this study is to co...

The frequency of alpha-thalassemia was 3.6% among Turkish newborns in a study that employed globin gene mapping analysis of DnA [4]. In our study, in 13 out of 205 cord blood samples alpha-thalassemia was found 6.3%. There was mistake at incidence so hat we improved with erratum [5]. The incidence of β-thalassemia trait was very high level, the incidence of a-thalassemia trait was also found hi...

The geographical distribution of Alpha and Beta-Thalassemias differ markedly. Alpha-Thalassemia being particularly prevalent in Southeast Asia and Beta-Thalassemia in the Mediterranean basin. Thalassemia syndromes are common in Saudi Arabia: the Beta-Thalassemia genes occur with variable frequency in different regions of Saudi Arabia and both B+ and Bo thalassemia have been reported. Alpha-Thal...

Background. Nontransfusion dependent thalassemia (NTDT) is a milder form of thalassemia that does not require regular transfusion. It is associated with many complications, which differ from that found in transfusion-dependent thalassemia (TDT). Currently available information is mostly derived from beta-NTDT; consequently, more data is needed to describe complications found in the alpha-NTDT f...

We report the general phenotype severity and the hematological presentation in a cohort of 125 sickle cell anemia (SCA) patients with identical homozygous HbS/S genotype and categorized by identical β(S) haplotype, both with and without alpha thalassemia. No clear general phenotype correlation was found when patients were compared regardless of the haplotype but overall, patients with homozygou...

Introduction Thalassemia is a group of genetic disorders resulting in the decreased production of globin chains, alpha or beta, leading to the decreased production of hemoglobin (Hb). For the heterozygous state, it can be recognized by the microcytosis of its red blood cell or the decreased mean corpuscular volume (MCV) of less than 80 fL. For alpha-thalassemia-1 or alpha(0)thalassemia traits, ...

Alpha-thalassemias are characterized by decreased hemoglobin alpha chain synthesis; alpha-zerothalassemia being the condition where no normal alpha globin is produced, and alpha-plus-thalassemia being the condition where there is reduced globin production. There are two alpha globin genes per haploid genome, and alpha thalassemia abnormalities can result from one to four gene deletions. A singl...

In Ontario, Canada, beta-thalassemia is easily detected through measurement of hemoglobin A2, but most laboratories do not do exhaustive DNA investigations for alpha-thalassemia. Therefore, the prevalence of thalassemia in microcytic samples for hemoglobinopathy investigation in Ontario is unknown. To address this, we performed a prospective cohort study in which samples referred for hemoglobin...

Whole blood samples of patients with various forms of alpha thalassemia including hemoglobin H disease, alpha thalassemia trait, and the "silent carrier" state were incubated with leucine-(14)C for definition of relative rates of production of alpha and beta chains in these disorders. The chains were separated by carboxymethyl cellulose chromatography in the presence of 8 M urea and dithiothrei...

The frequency of thalassemia was determined in a group of 541 healthy adult black males. Individuals with decreased mean corpuscular hemoglobin (MCH) values were evaluated further with hemoglobin analysis, iron studies, and globin chain synthesis. Of the males screened, 13.4% had MCH levels below 27.0 pg, while 1.4% had heterozygous beta thalassemia, 2.3% had iron deficiency, and 5.7% had globi...